tests: Disable a flaky tests (#2332)

## Description

See #2331 to track this.


## Breaking Changes

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including how to migrate older code. -->

## Notes & open questions

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## Change checklist

- [x] Self-review.
- ~~[ ] Documentation updates if relevant.~~
- ~~[ ] Tests if relevant.~~
- ~~[ ] All breaking changes documented.~~

iroh/src/node.rs

@@ -253,6 +253,7 @@ mod tests {
     }
 
     #[tokio::test]
+    #[ignore = "flaky"]
     async fn test_node_add_tagged_blob_event() -> Result<()> {
         let _guard = iroh_test::logging::setup();